The RS Speakers W 220.50 Fibonacci 8Ω is a high-end 8-inch woofer developed with innovative technology and meticulous craftsmanship. At the heart of this woofer is the unique Fibonacci cone made of paper pulp, which utilizes a patented, laser-engraved geometry inspired by the Golden Ratio for optimal rigidity and minimal resonance. With advanced materials and sophisticated engineering, the W 220.50 Fibonacci delivers outstanding sound quality and dynamic performance, making it the ideal choice for discerning audio enthusiasts and professional loudspeaker builders.

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Highlights

• Patented Fibonacci paper membrane with laser-engraved para-elliptical profile to reduce resonances
• Double surface damping and double asymmetric rubber surround for optimal control
• 2-inch voice coil on fiberglass former, capable of high thermal and dynamic stability
• Ventilated ferrite magnetic circuit with aluminum equalization ring for low distortion.
• Includes sealing gasket, mounting screws and thumb nuts for easy installation.

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Product details

RS Speakers W 220.50 Fibonacci 8Ω 8” woofer

The W 220.50 Fibonacci is a true flagship among subwoofers, featuring an innovative paper cone meticulously crafted in a para-elliptical shape with a laser-engraved Fibonacci pattern. This unique design not only increases the cone's rigidity but also minimizes unwanted resonances, resulting in exceptionally pure and natural sound. The sandwich-like cone structure is coated with acrylic on the front and a damping layer on the back, ensuring a perfect balance between rigidity and internal damping for detailed and dynamic audio reproduction.

Particular attention was paid to the suspension system. The rubber surround utilizes Double Asymmetric Rolls technology, ensuring symmetrical excursion and excellent control of the diaphragm movement. The progressive Conex spider further optimizes linearity and minimizes mechanical offset, guaranteeing clean bass even at high levels. The 2-inch voice coil on a fiberglass former ensures mechanical stability and reliability under demanding operating conditions, making this woofer ideal for high-end loudspeakers and advanced DIY projects.

The magnetic circuit utilizes a robust ferrite magnet with a vented design, reducing power loss and ensuring consistent performance even during extended listening sessions. An integrated aluminum equalization ring lowers overall inductance and reduces harmonic distortion, improving clarity across the entire frequency range. The free-compression basket design with thin spokes eliminates rear reflections and further enhances the precision of the soundstage.

With an AES power handling of 200 W and a sensitivity of 91.3 dB at 1 W/1 m, the RS Speakers W 220.50 Fibonacci is perfectly suited for high-end home audio and professional loudspeaker systems. Its precise construction and high-quality components also make it an excellent choice for DIY speaker kits and custom installations. All necessary mounting hardware is included, ensuring easy integration into your next project. Experience the pinnacle of Italian loudspeaker innovation with this exceptional bass-midrange driver.

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Technical data

• Article number: W 220.50 Fibonacci
• woofer series Fibonacci
• woofer type Woofer
• Nominal diameter 8" | 220 mm
• Resilience (QMW) 200W
• Continuous Program Power 400W
• Impedance (Z) 8 Ω
• Sensitivity (SPL at 1m / 2.83V) 91.3 dB
• Voice coil diameter 50 mm
• Weight magnet 930 g
• DC resistance (Re) 5.1 Ω
• Voice coil induction (Le) 0.65 mH
• Resonance frequency (Fs) 33.4 Hz
• Mechanical quality (Qms) 5.81
• Electrical quality factor (Qes) 0.39
• Total quality (Qts) 0.36
• Moving mass (mms) 26.5 g
• Suspension compliance (Cms) 857 µm/N
• Membrane area (Sd) 213.8 cm²
• Force factor (BL) 8.60 Tm
• Equivalent volume (Vas) 55.6 L
• Maximum displacement (Xmax) 6.0 mm
• Cone / Diaphragm Material paper
• Bead material Rubber
• Voice coil wire material aluminum
• Voice coil mold material Fiberglass
• Basket/frame material Aluminum die-cast
• Magnetic material Ferrite
• Outer diameter 220 mm
• Total depth 97.6 mm
• Cutout diameter 184 mm
• Bolt Circle Diameter 198.5 mm
• Mounting holes 8
• Mounting hole diameter 4.5 mm
• Bass reflex volume 31 L
• Bass reflex F3 33 Hz